Jeweler&#39;s blowpipe.



K. c. KUNKLE; JEWELERS BLOWPIPE.

APPLICATION FILED DEC- 17, I917.

1,262,21 3 Patented Apr. 9,1918.

KENTON c. K'UNKLE, or BnLLnvUE, KENTUCKY, ASSIGNOR or ONE-HALF TO FREDG. KRUEGER, or NORWOOD, 01110.

JnwELnns BLOWPIPE.

Specification of Letters Patent.

Patented Apr. 9, 1918.

Application filed December 17, 1917. Serial No. 207,409.

To all whom it may concern:

Be it known that I, KnNToN C. KUNKLE, a citizen of the United States,and a resident of Bellevue, in the county of Campbell and State ofKentucky, have invented certain new and useful Improvements in JewelersBlowpipes, of which the f0llowing is a full, clear, and exactdescription, reference being had to the accompanying drawing formingpart of this specification.

My invention relates to blow pipes particularly for jewelers use, totake the place of the mouth pipes now used as blow pipes in mostinstances.

I am aware that there are in the art various instances where a source ofsupply of compressed air, a hand air bulb, or the like has beenattempted to be employed in the place of the mouth pipe, but I do notknow of any instance wherethe necessary delicacies of adjustment ofdirection and density of flame have been accomplished sufiiciently bythese devices to replace the mouth pipe for even ordinary work.

It is the object of my invention to pro vide a mechanical blow pipe, inconnection with a jewelers burner which will accomplish most of thefunctions of the mouth blow pipe, in a simple manner to which a workmancan readily accommodate himself. Among other things I have found itrequisite to a mechanical device for the above purpose to provide afairly long air pipe, or blow pipe, which can be longitudinally adjustedwith relation to the burner, and which has at its end a substantiallyshort and angling nozzle. In this manner I am enabled to get drafts ofair through the pipe at all angles from directly across the burner toparallel with the escape of gas therefrom, and still have the nozzle ofthe blow pipe closely adjacent the base of the flame, whereas were thenozzle long as compared to the blow pipe, the mouth of the nozzle couldnot be maintained at the base of the flame for upward as well ascrosswise drafts.

It is my object to make the structure of the device as simple andelementary as possible, because a complexity of movements of amechanical blow pipe makes it of little value in shop practice. vI alsodesire to provide an assembly of gas pipe and blow pipe, together with aslanting jewelers burner, which is strong and compact and can be sold asa unit for jewelers use.

The above object and other advantages to be noted I accomplish by thatcertain construction and arrangement of parts to be hereinafter morespecifically pointed out and claimed.

In the drawing,

Figure 1 isa side elevation of the device.

Fig. 2- is a longitudinal section taken through the extensible blowpipe, the nozzle being in elevation.

, Fig. 8 is a detail side elevation of the bent up end of the air pipeon which the blow pipe is mounted.

Although my blow pipe device might be employed in many ways incombination with a gasburner of jewelers type, I have shown it only inrelation to a special arrangement of gas pipe and burner which goesv tomake up a unit installation for jewelers practice.

In the assembly selected for purposes of illustration of the invention,there is a gas pipe 1, and an air pipe 2, with valves 3 and L for thesaid two pipes respectively. The gas pipe extends beyond the valve andis turned at an angle upwardly at 5, where it is fitted with the fiattopped jewelers burner 6. The burner 6, which is of any usual type isthus set at an angle to the vertical;

The air pipe beyond the valve is turned up at 7, at a less angle thanthe gas burner pipe, the part 7 serving to telescope within the blowpipe. The blow pipe is in two parts, as shown, a tube 8 having a fingerpiece 9 at the base thereof, and a telescoping tube 10 having the nozzle11 at the end.

It should be noted that the nozzle is a short pipe of much smallertubing, which is extended at an angle to the axis of the tube 10. Whenthe tube 8 is placed over the end of the air pipe at 7 and the tube 10inserted in the tube 8, it can be seen that an extensible air pipe isprovided. The angle of the air pipe and the angle of the nozzle to theaxis of the blow pipe made up by said telescoping tubes are such as tobring the nozzle into a position where the revolving of the tube on theend of the air pipe will swing the nozzle through exactly the desiredare. This are should be such as to allow a jet of air directly acrossthe base of the flame of the burner, and a jet directly parallel withthe escaping gas or flames from the burner, together with theintermediate positions between said two extremes.

The extensibility or longitudinal adjustment of the blow pipe should besuch as to permit its end to extend say to a position over the center ofthe burner. The above adjustments of the nozzle and blow pipe need notbe precisely as mentioned, as a substantial compliance with the abovenoted requisites would approximate by so much the results gained by myinvention.

In connection with the gas and air pipes, some sort of clamp ispreferably provided as at 12 (Fig. 1), which will hold the two pipestogether and make of the gas burner and blow pipe a unit for sale tojewelers. A pilot light 13 will also be provided with the set.

The essential of the invention, as I see it at this time, is in the blowpipe having longitudinal adjustment toward the burner and provided witha nozzle at an angle to the axis of the pipe and of relatively smallsize with relation to the pipe.

Having thus described my invention, what I claim as new and desiretosecure by Letters Patent, is

1. In combination with a jewelers burner,

an air pipe and a straight blow pipe connected thereto, means forslidably and rotatably mounting said blow pipe on said air Gopies ofthis patent may be obtained for five cents each, by addressing,

' Washington, D. C. 7

pipe, and a short nozzle for said blow pipe,

extending at an angle to the axis of the pipe.

2. In combination with a gas burner, a blow pipe having a source ofsupply of air, and means having fixed relation with the gas burner forextendibly and rotatably mounting the blow pipe, said blow pipe having ashort nozzle extending atan angle to the axis of the pipe.

3. The combination with a jewelers burner set at an angle to thehorizontal, of'a revoluble, extendible, straight blow pipe having aslanting axial position, and a short nozzle for said blow pipeextendingat an angle to the axis of the said pipe, for the purposedescribed. I

4. In a device of the character described, the combination of an airpipe and a gas pipe secured to each other, a gas burner on the gas pipe,a tubular end for the air pipe, a straight tubular blow pipe adapted totelescope over the end of the air pipe, and a nozzle on the end of theblow pipe, extending at an angle to the axis of the blow pipe.

5. In a device of the character described, the combination of an airpipe and a gas pipe secured to each other, a gas burner set slantinglyon the gas pipe, a tubular end for the air pipe extending slantinglytherefrom, a straight tubular blow pipe adapted to telescope over theend of the air pipe, and a nozzle on the end of the blow pipe, extendingat an angle to the axis 'ofthe blow pipe;

' KENTONO. KUNKLE,

the Commissioner of Patents,

